James Grace, 6, looks at a butterfly during the Changing Minds Foundation's "Butterfly Flutter By" event Sunday, April 22, 2012, in Houston. The foundation released 1,000 live butterflies as part of the event designed to raise awareness of available treatment and research of Down syndrome, a condition that affects one in every 733 babies born in the U.S. Each butterfly could be sponsored for $21, a representative of Trisomy 21, a chromosomal condition caused by the presence of all or part of an extra 21st chromosome that causes Down syndrome. (AP Photo/Houston Chronicle, Cody Duty) MANDATORY CREDIT less

James Grace, 6, looks at a butterfly during the Changing Minds Foundation's "Butterfly Flutter By" event Sunday, April 22, 2012, in Houston. The foundation released 1,000 live butterflies as part of the event ... more

Photo: Cody Duty, Associated Press

James Grace, 6, looks at a butterfly during the Changing Minds...photo-2848951.41955 - |ucfirst

An American flag is seen through rain drops on a window as rain falls in Baltimore, Sunday, April 22, 2012. (AP Photo/Patrick Semansky)

An American flag is seen through rain drops on a window as rain falls in Baltimore, Sunday, April 22, 2012. (AP Photo/Patrick Semansky)

Photo: Patrick Semansky, Associated Press

An American flag is seen through rain drops on a window as rain...photo-2848952.41955 - |ucfirst

Chicago Cubs catcher Geovany Soto throws to first after Cincinnati Reds' Johnny Cueto hit a sacrifice bunt during the sixth inning of a baseball game in Chicago, Sunday, April 22, 2012. Cueto was safe at first. (AP Photo/Nam Y. Huh) less

Chicago Cubs catcher Geovany Soto throws to first after Cincinnati Reds' Johnny Cueto hit a sacrifice bunt during the sixth inning of a baseball game in Chicago, Sunday, April 22, 2012. Cueto was safe at first. ... more

HOUSTON,TX- APRIL 22: Andre Ethier #16 of the Los Angeles Dodgers leaps but can't make a catch on a grand slam home run off the bat of Jordan Schafer #1 of the Houston Astros in the second inning on April 22, 2012 at Minute Maid Park in Houston, Texas.(Photo by Bob Levey/Getty Images) *** BESTPIX *** less

HOUSTON,TX- APRIL 22: Andre Ethier #16 of the Los Angeles Dodgers leaps but can't make a catch on a grand slam home run off the bat of Jordan Schafer #1 of the Houston Astros in the second inning on April 22, ... more

Music lovers sleep in the Gobi tent at the Coachella Valley Music and Arts Festival in Indio, Calif. Sunday, April 22, 2012. (AP Photo/The Desert Sun, Jay Calderon) RIVERSIDE PRESS-ENTERPRISE OUT; NO SALES; NO FOREIGN less

Music lovers sleep in the Gobi tent at the Coachella Valley Music and Arts Festival in Indio, Calif. Sunday, April 22, 2012. (AP Photo/The Desert Sun, Jay Calderon) RIVERSIDE PRESS-ENTERPRISE OUT; NO SALES; ... more

Photo: Jay Calderon, Associated Press

Music lovers sleep in the Gobi tent at the Coachella Valley Music...photo-2848955.41955 - |ucfirst

Fitz and the Tantrums perform on the Coachella Stage during the Coachella Valley Music and Arts Festival at the Empire Polo Fields on Sunday, April 22, 2012 in Indio, Calif. (AP Photo/The Desert Sun, Marilyn Chung) RIVERSIDE PRESS-ENTERPRISE OUT; NO SALES; NO FOREIGN less

Fitz and the Tantrums perform on the Coachella Stage during the Coachella Valley Music and Arts Festival at the Empire Polo Fields on Sunday, April 22, 2012 in Indio, Calif. (AP Photo/The Desert Sun, Marilyn ... more

Photo: Marilyn Chung, Associated Press

Fitz and the Tantrums perform on the Coachella Stage during the...photo-2848956.41955 - |ucfirst

Desirae Somers, Jesus Esparza, and Crystal Escamilla, members of New Mexico State University's Atomic Aggies team, carry their rocket, the Crimson Comet, back to the staging area during NASA's student launch initiative at Bragg Farms in Toney, Ala. Sunday, April 22, 2012. More than 500 students, representing 55 middle schools, high schools, colleges and universities in 29 states, will launch sophisticated rockets of their own design -- complete with working science payloads -- into the skies for the annual NASA Student Launch Initiative. (AP Photo/The Huntsville Times, Eric Schultz) less

Desirae Somers, Jesus Esparza, and Crystal Escamilla, members of New Mexico State University's Atomic Aggies team, carry their rocket, the Crimson Comet, back to the staging area during NASA's student launch ... more

An Army carry team carries the transfer case containing the remains of a fallen soldier upon arrival at Dover Air Force Base, Del. on Sunday, April 22, 2012. The Department of Defense announced the death of Army Chief Warrant Officer 2 Nicholas S. Johnson of San Diego Calif., Army Chief Warrant Officer 2 Don C. Viray of Waipahu, Hawaii, Army Spc. Dean R. Shaffer of Pekin Ill., and Army Spc. Chris J. Workman of Boise, Idaho who were supporting Operation Enduring Freedom in Afghanistan when the Black Hawk helicopter went down in Helmand Province. The Army did not identify each casualty. (AP Photo/Jose Luis Magana) less

An Army carry team carries the transfer case containing the remains of a fallen soldier upon arrival at Dover Air Force Base, Del. on Sunday, April 22, 2012. The Department of Defense announced the death of ... more

Photo: Jose Luis Magana, Associated Press

An Army carry team carries the transfer case containing the remains...photo-2848958.41955 - |ucfirst